Medical or dental instrument with a temperature-measuring device
First Claim
1. A handpiece, comprisinga handpiece head having an outer shell defining an inner volume,a tool holder device for releasably holding a tool that can be connected to the handpiece, wherein the tool holder device is moveably arranged in the inner volume,at least one bearing unit operatively connected to the tool holder device to moveably support the tool holder device, wherein the at least one bearing unit is arranged in the inner volume,a drive device for setting in motion a tool that can be connected to the tool holder device,a temperature-measuring device for measuring a temperature of at least a part of the handpiece, wherein the temperature-measuring device comprises an electrical temperature sensor which is arranged in a partial space of the inner volume, said partial space being bordered on a first side by the at least one bearing unit and on a second side by the tool holder device, so that the temperature sensor can measure the temperature of at least one of the bearing unit or the tool holder device, andan electric line or signal line connecting the temperature sensor of the temperature-measuring device to a unit comprising at least one of an evaluation unit for evaluating the measured signals of the temperature-measuring device, a regulating or control unit for temperature-dependent regulation or control of the handpiece or a display unit for displaying the measured or determined temperature value or a temperature limit value, wherein the electric line or signal line extends out of the handpiece head to connect to the unit.
1 Assignment
0 Petitions
Accused Products
Abstract
Medical or dental instruments, preferably handpieces, can have different temperature-measuring devices for measuring the temperature in the instrument or of at least a part of the instrument. The temperature-measuring devices can be designed, for example, to measure the temperature contactlessly by detection of electromagnetic radiation or to measure the temperature of an interior of the instrument that can be heated by a heat source. The temperature-measuring devices may be designed, for example, as electrical temperature measuring devices or may have a magnetic material whose magnetic property is a function of temperature and/or has a temperature-dependent course. The temperature-measuring device may have, for example, an electrical switching device and a signal device wherein the signal device is switched at least between a first signal condition and a second signal condition when a temperature limit value is reached or exceeded or is underrun.
-
Citations
30 Claims
-
1. A handpiece, comprising
a handpiece head having an outer shell defining an inner volume, a tool holder device for releasably holding a tool that can be connected to the handpiece, wherein the tool holder device is moveably arranged in the inner volume, at least one bearing unit operatively connected to the tool holder device to moveably support the tool holder device, wherein the at least one bearing unit is arranged in the inner volume, a drive device for setting in motion a tool that can be connected to the tool holder device, a temperature-measuring device for measuring a temperature of at least a part of the handpiece, wherein the temperature-measuring device comprises an electrical temperature sensor which is arranged in a partial space of the inner volume, said partial space being bordered on a first side by the at least one bearing unit and on a second side by the tool holder device, so that the temperature sensor can measure the temperature of at least one of the bearing unit or the tool holder device, and an electric line or signal line connecting the temperature sensor of the temperature-measuring device to a unit comprising at least one of an evaluation unit for evaluating the measured signals of the temperature-measuring device, a regulating or control unit for temperature-dependent regulation or control of the handpiece or a display unit for displaying the measured or determined temperature value or a temperature limit value, wherein the electric line or signal line extends out of the handpiece head to connect to the unit.
-
30. A handpiece, comprising
a handpiece head having an outer shell defining an inner volume, a tool holder device for releasably holding a tool that can he connected to the handpiece, wherein the tool holder device is moveably arranged in the inner volume, at least one bearing unit positioned to rotatably support the tool holder device, wherein the at least one bearing unit is arranged in the inner volume, a drive device for setting in motion a tool that can be received in the tool holder device, and a temperature-measuring device for measuring an interior temperature within the inner volume, the temperature-measuring device comprising an electrical temperature-measuring sensor having at least a first heat receiving direction and a second heat receiving direction and wherein the temperature-measuring sensor is positioned relative to the tool holder device such that the first heat receiving direction extends from an axial end surface of the bearing unit substantially parallel to the tool holder and towards the sensor, the second heat receiving direction extends from the tool holder device in a substantially radial direction towards the sensor, and the first and second heat receiving directions intersect in the area of the sensor, so that the interior temperature measured by the temperature sensor is influenced by heat received at the sensor along the first direction and along the second direction.
Specification